A fire that reduced the 18th century Clandon park mansion was started accidentally and probably caused by a fault in an electrical distribution board, a report has said.
Thousands of items were feared lost in the fire on April 29th at the Grade-1 listed stately home near Guildford, Surrey.
A Surrey fire and rescue (FRS) report said the most likely cause was "a resistance heating fault on a neutral bar in the electrical distribution board" in a basement cupboard.
It said "This electrical connection would have repeatedly overheated, when subject to sufficient electrical load, ever since the distribution board was fitted".
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There is a big chance that a thermal imaging survey would of picked up this issue, whilst the electrical system is under load, a resistance heating fault can be defined in as much as whenever an electrical current flows through a material that has some resistance, it creates heat, in extreme cases, unfortunately like this accident resistive heating can literally melt the cables.